Class notes
Epidemiology Chapter 2 lecture
Lecture on epidemiology chapter 2 covering gordis textbook
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
Seller
Follow
Content preview
According to Germ theory of disease:1. All smell is disease
2. All people infected with a microorganisms will become ill
3. Infectious diseases are caused by humoral imbalance
4. Infectious diseases are caused by living microorganisms
Infectious vs Communicable disease
● Following Gordis, we use these terms as synonyms
● Distinction relevant for diseases caused by living organisms which cannot be transmitted
from person-to-person
○ Tetanus caused by Clostridium tetani
○ Infected through rust and iron, not person-person
Epidemiologic Triad
● Risk factors may be classified by characteristics of
○ Host: age, sex, gender
■ Here, the host is always the human in epidemiology
○ Agent : What cause the disease
○ Environment: what brings host and agents together
● Host is always human for epidemiological strides
● Environment provides conditions needed to bring host and agent together
● Triad informs disease prevention strategies
● Applies also to non-infectious disease
Malaria
● Disease risk factors for malaria may be classified by characteristics of
○ Host
○ Agent: Plasmodium genus(parasite)
○ Environment: swampy, warm, wet
● Disease vector(mosquito)
○ What transmits malaria
● Goal: identify ways to control disease spread
, Epidemiologic triad: Malaria
● May control malaria by affecting one of
○ Host: vaccine, insecticides-treated bed nets
○ Agents: eliminate parasite
○ Environment: drain swamps
○ Vectors: release genetically modified mosquitoes
Modes of transmission
● Distinguish diseases by how they spread
● Disease outbreak(possibility, size) depend on
○ Mode of transmission of agent
○ Rate of growth in the population
○ Number of susceptible people in a population
● Outbreak of tetanus
○ Cant be spread person to person
○ Can control it by informing lifestyle, vaccine
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller kyuju. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for CA$13.74. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67866 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now